The April 18, 1983 United States embassy bombing was a suicide bombing in Beirut, Lebanon, that killed 63 people, mostly embassy and CIA staff members, several soldiers and one Marine. 17 of the dead were Americans. It was the deadliest attack on a U.S. diplomatic mission up to that time, and is thought of as marking the beginning of anti-U.S. attacks by Islamist groups.

The attack came in the wake of the intervention of a Multinational Force, made up of Western countries, including the U.S., in the Lebanese Civil War, to try to restore order and central government authority.

The car bomb was detonated by a suicide bomber driving a delivery van packed with about 2,000 pounds (910 kg) of explosives at approximately 1:00 pm (GMT+2) April 18, 1983. The van, originally sold in Texas, bought used and shipped to the Gulf,[1] gained access to the embassy compound and parked under the portico at the very front of the building, where it exploded. Former CIA operative Robert Baer's account says that the van broke through an outbuilding, crashed through the lobby door and exploded there.[2] The blast collapsed the entire central facade of the horseshoe-shaped building, leaving the wreckage of balconies and offices in heaped tiers of rubble, and spewing masonry, metal and glass fragments in a wide swath. The explosion was heard throughout West Beirut and broke windows as far as a mile away. Rescue workers worked around the clock, unearthing the dead and wounded.

Robert S. Dillon, then Ambassador to Lebanon, recounted the attack in his oral history:

"All of a sudden, the window blew in. I was very lucky, because I had my arm and the T-shirt in front of my face, which protected me from the flying glass. I ended up flat on my back. I never heard the explosion. Others said that it was the loudest explosion they ever heard. It was heard from a long distance away.

As I lay on the floor on my back, the brick wall behind my desk blew out. Everything seemed to happen in slow motion. The wall fell on my legs; I could not feel them. I thought they were gone. The office filled with smoke, dust, and tear gas. What happened was that the blast first blew in the window and then traveled up an air shaft from the first floor to behind my desk. We had had tear gas canisters on the first floor. The blast set them off so that the air rush that came up through the shaft brought the tear gas with it and also collapsed the wall.

...We didn’t know what had happened. The central stairway was gone, but the building had another stairway, which we used to make our way down, picking our way through the rubble. We were astounded to see the damage below us. I didn’t realize that the entire bay of the building below my office had been destroyed. I hadn’t grasped that yet. I remember speculating that some people had undoubtedly been hurt. As we descended, we saw people hurt. Everybody had this funny white look because they were all covered with dust. They were staggering around.

We got to the second floor, still not fully cognizant of how bad it was, although I recognized that major damage had been done. With each second, the magnitude of the explosion became clearer. I saw Marylee MacIntyre standing; she couldn’t see because her face had been cut and her eyes were full of blood. I picked her up and took her over to a window and gave her to someone. A minute later, someone came up to me and said that Bill MacIntyre was dead; he had just seen the body. That was the first time I realized that people had been killed. I didn’t know how many, but I began to understand how bad the blast had been."[3]

A total of 63 people were killed in the bombing: 32 Lebanese employees, 17 Americans, and 14 visitors and passersby.[4] Of the Americans killed, eight worked for the Central Intelligence Agency, including the CIA's top Middle East analyst and Near East director, Robert C. Ames, Station Chief Kenneth Haas and most of the Beirut staff of the CIA. Others killed included William R. McIntyre, deputy director of the United States Agency for International Development, two of his aides, and four U.S. military personnel. Lebanese victims included clerical workers at the embassy, visa applicants waiting in line and nearby motorists and pedestrians.[5] An additional 120 or so people were wounded in the bombing.

U.S. President Ronald Reagan on April 18 denounced the "vicious terrorist bombing" as a "cowardly act," saying, "This criminal act on a diplomatic establishment will not deter us from our goals of peace in the region."[6] Two envoys, Philip C. Habib and Morris Draper, continued their peace mission in Beirut to discuss Lebanese troop withdrawals with a renewed sense of urgency.

The next day, Ambassador Robert Dillon, who had narrowly escaped injury in the bombing, said: "Paramount among the essential business is our work for the withdrawal of all foreign forces from Lebanon." It is only by securing Lebanese government control over the country "that terrible tragedies like the one we experienced yesterday can be avoided in the future."[5]

The President of Lebanon, Amine Gemayel, cabled President Reagan on April 18, saying, "The Lebanese people and myself express our deepest condolences to the families of the U.S. victims. The cross of peace is the burden of the courageous."[5] Meanwhile, Lebanon asked the U.S., France, and Italy to double the size of the peacekeeping force. As of March 16, it numbered about 4,800 troops, including some 1,200 U.S. Marines, 1,400 Italian soldiers, 2,100 French paratroopers and 100 British soldiers.

Iran denied any role in the attack. Foreign Minister, Ali Akbar Velayati said, "We deny any involvement and we think this allegation is another propaganda plot against us."[7]

On April 19, Prime Minister Menachem Begin of Israel sent President Reagan a message of condolence for the embassy bombing. "I write in the name of Israel when I express to you my deep shock at the terrible outrage which took the lives of so many of the American embassy in Beirut yesterday."[5] Defense Minister Moshe Arens, was quoted by Israeli radio that he told the cabinet the attack "justified Israel's demands for security arrangements in Lebanon." Minister Yitzhak Shamir of Israel called the embassy bombing "shocking" but added that, "In Lebanon nothing is surprising. I think the lesson is simple and understood. The security problems in Lebanon are still most serious, and terrorist organizations will continue to operate there, at times with great success."[5]

The House Foreign Affairs Committee April 19 voted to approve $251 million in additional economic and military aid for Lebanon, as requested by the administration. But it attached an amendment to the bill that would force the White House to seek approval for any expanded U.S. military role.

The Senate Foreign Relations Committee followed suit April 20, approving the aid request but attaching an amendment that required the president to obtain congressional authorization for "any substantial expansion in the number or role of U.S. armed forces in Lebanon or for the creation of a new, expanded or extended multinational peacekeeping force in Lebanon." If Congress did not act jointly on such a request within 60 days, however, the increase would then take effect automatically.

The Senate amendment was sponsored as a compromise by committee Chairman Charles H. Percy (R, Ill.). It prevented a move by the committee's ranking Democrat, Claiborne Pell (R.I.), to extend the 1973 War Powers Resolution to Lebanon. On April 20, Pell said he would have had the votes to apply the resolution to U.S. Marines in Lebanon. The law limited presidential commitment of troops in hostile situations to a maximum of 90 days unless Congress specifically approved their use.

Undersecretary of State Kenneth W. Dam, in a letter to the committee, had argued forcefully against use of the War Powers Resolution. Dam said it would "amount to a public finding that U.S. forces will be exposed to imminent risk of involvement in hostilities", which "could give entirely the wrong public impression" of U.S. expectations for Lebanon's future. Several influential congressmen had been urging an end to the U.S. military role in Lebanon. After the embassy bombing, April 19, Sen. Barry Goldwater (R, Ariz.) said, "I think it's high time we bring the boys home."

A pro-Iranian group calling itself the Islamic Jihad Organization took responsibility for the bombing in a telephone call to a news office immediately after the blast. The anonymous caller said, "This is part of the Iranian revolution's campaign against imperialist targets throughout the world. We shall keep striking at any crusader presence in Lebanon, including the international forces."[8] (The group had earlier taken responsibility for a grenade attack in which five U.S. members of the international peacekeeping force had been wounded.)

Judge John Bates of the U.S. District Court in Washington, D.C. September 8, 2003, awarded $123 million to 29 American victims and family members of Americans killed in the 1983 bombing of the U.S. embassy in Beirut. Judge Royce Lamberth of U.S. District Court in Washington, D.C. May 30, 2003, had determined that the bombing was carried out by the militant group Hezbollah with the approval and financing of senior Iranian officials, paving the way for the victims to seek damages. The trial had opened March 17.

Following the attack, the embassy was moved to a supposedly more secure location in East Beirut. However, on September 20, 1984, another car bomb exploded at this embassy annex, killing twenty Lebanese and two American soldiers.